Not sure if this is tripping any of you guys up but xintensity 64 for a 290x is not the same as xintensity 64 for a 280x or even a 290. xintensity is a multiple of shaders your card has.
For example a 290x at xintensity 64 is 2816*64 = 180224 raw intensity which is close to an intensity of 17.45 (2^17.45 = 179049)
a 290 at xintensity 64 is 2560*64 = 163840 raw intensity which is close to an intensity of 17.32 (2^17.32 = 163621)
Not much of a difference between a 290x and a 290 but with a 7950 having 1792 shaders would be something like an intensity of 16.8
Again not a huge deal but something to consider.
No shit. That's the entire point of xintensity.
Just trying to help. I guarantee that someone out there thinks they are pushing their 7950 with an xintensity of 64 as hard as you are pushing your 290x. Maybe I have a misunderstanding, is the thinking supposed to be that a 7950 can't handle the same intensity as a 290? I try to keep my 290s and 290Xs around the same raw intensity. I always took it that intensity was just how hard you want to push your card, so if you wanted to push your 290x to intensity of 17, for an older card you would have to add more to xintensity to reach intensity of 17. Oh well I've never mined with different types of cards so I never had to consider it.